Dispenser for media
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United States of America Patent
Stats
-
Mar 23, 1999
Issued Date -
N/A
app pub date -
Feb 19, 1997
filing date -
Feb 22, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A dispenser (1) comprises for its plunger chamber (13) an outlet valve (20) which after opening on the actuating stroke continues to remain open for a time during the subsequent return stroke due to a delay means (30) so as to ensure a more or less complete venting or filling of the plunger chamber (13). At the end of the delay period the closure maintained in the open position position by friction surface areas (37, 38) is released and automatically jumps back into its closed position. After venting, the effectiveness of the delay means (30) diminishes so that in normal operation substantially only a pressure dependent opening and closing of the outlet valve (20) is provided for.
First Claim
Family
International Classification(s)
Cited Art Landscape
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